RFQ_2025-2_Exhibit_A-_Electrical_Masterplan_Section.pdf

01/10/2025

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4.7.7.3 Emergency Response Plan

T The ERP is a outlines streamlined procedures that empower Utilities staff to adeptly coordinate and execute extensive disaster preparedness, mitigation efforts, and emergency response and recovery operations. Moreover, the ERP equips Utilities with the capability to significantly reduce the potential impact on public health, well-being, and the environment in

Figure 4-55 illustrates the front cover of the 2021 ERP report. The next five-year submission deadline for the ERP is December 31, 2026.

4.8 Electrical Service and Back-Up Power

4.8.1 Introduction

Cooper City owns and operates the Cooper City WTP and Cooper City WWTP. Both treatment facilities reside on the same property (as illustrated in Figure 4-1) and because of their close proximity, utilize the same electrical system to supply

A single power supply from Florida Power and Light (FPL) is routed to the facility and connected to the on-site FPL Vault. Within the vault, FPL metering, terminations, potentially FPL transformers, and protective devices establish the primary utility service which is connected to the

Switchgear SWGR1. The interior of the FPL vault is not accessible to the City staff and interior components could not be readily verified. All power to the WTP and the WWTP is distributed via the Plant Switchgear SWGR1 illustrated in Figure 4-56. A single line diagram of the electrical system is shown in Figure 4-57.

Figure 4-55: ERP 2021

Figure 4-56: Plant Switchgear SWGR1

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July 15, 2015

4.8.2 Existing Electrical System

4.8.2.1 Electrical System Top-End Equipment

purpose is to protect the electrical equipment from the majority of the elements. It was constructed in 2002 and is not considered a building nor does it conform to any Building Codes.

Switchgear SWGR1 is rated at 600 amps and 22.86 kV. SWGR1 was installed in the 1970s as part of the West WTP (lime softening) construction. The lime softening treatment equipment was demolished in 2004.

SWGR 1 was modified in 1996 to supply power to the GAH WTP.

Switchgear SWGR1 includes an automatic transfer switch (ATS) that is designed to automatically transfer of loss of FPL power. The ATS is supplied with battery backup power via an uninterruptible power supply (UPS) illustrated in Figure 4-58.

The City has made recent improvements to its maintenance procedures to ensure that it has a supply of replacement battery cells for the UPS to ensure that it functions when called upon.

Power is fed throughout the plant at 22.86 kV to City owned (and maintained) transformers that step down the power to 480 volt. Based on the available record drawings, the transformers in the plant are summarized in Table 4-7.

Table 4-7: Plant 22.86 KV to 480 V Transformers

Transformer Rating Year

Installed Additional Data

1TX1 2500 KVA 1970s Transformer 1TX1 feeds power from the Diesel Engine Generator to Switchgear SWGR 1; it is located on the west side of SWGR1.

12TX1 750 KVA 1996

Transformer 12TX1 supplies power to HSPS Switchboard SWBD 4, MCC 12 and MCC12A. SWBD 4, MCC 12 and MCC12A are in the HSPS Electrical Room. SWBD 4 and MCC12A were installed in 1996. MCC 12 was installed in the 1970s.

13TX1 750 KVA 1970s

Transformer 13TX1 supplies power to MCC 4 and DP-1 located in the WWTP effluent pump station electrical building. Transformer 13TX1 is located near the concentrate pump station and wastewater effluent pumps.

14TX1 1500 KVA 1996

Transformer 14TX1 supplies power to the Membrane Building Electrical Room Switchboard SWBD 3. Transformer 14TX1 is located on the west side of Switchgear SWGR 1 and south of the Membrane Building.

2TX1 2000 KVA Unknown Transformer 2TX1 supplies power to the Blower Electrical Building Switchgear SWGR 1.

2TX2 2000 KVA Unknown Transformer 2TX2 supplies power to the Blower Electrical Building Switchgear SWGR 2.

Figure 4-58: ATS UPS

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Table 4-7: Plant 22.86 KV to 480 V Transformers

Transformer Rating Year

Installed Additional Data

8TX1 300 KVA Unknown Transformer 8TX1 supplies power to the Sodium Hypochlorite Building Distribution Panel DPP 8. The Public Works Building is supplied with power via Distribution Panel DPP 8.

10TX1 300 KVA Unknown Transformer 10TX1 supplies power to the Dewatering Building Distribution Panel DPP 10.

Selected photos of certain transformers are present in Figure 4-59.

Figure 4-59: Selected Photos of Plant Transformers

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4.8.2.2 Membrane Building Electrical Room

The membrane building power is supplied from Switchboard SWBD 3 and MCCs 14A and 14B along with the associated VFDs for the membrane feed pumps. Figure 4-60 illustrates this critical electrical equipment. The equipment is located within the Membrane Building Electrical Room. This room is air conditioned.

Power to the Membrane Feed Pumps is distributed from Switchboard SWBD 3 via the VFDs. The photo in the lower right corner of the figure illustrates a typical VFD.

MCC 14A and MCCB are both rated at 600 amps and are powered by Switchboard SWBD 3. These MCCs distribute power to certain equipment as indicated below.

MCC 14A distributes power to the following equipment:

Scale Inhibitor Mixer

Corrosion Inhibitor Mixer

Membrane Cleaning Pump

Spent Cleaning Transfer Pump 1

Bulk Acid Transfer Pump 1

Bulk Sodium Hydroxide Transfer Pump 1

Degasifier Air Blower 1

Degasifier Transfer Pump 1

It includes space for future degasifier transfer pump 4

Figure 4-60: Membrane Building Electrical Room

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MCC 14B distributes power to the following equipment:

Spent Cleaning Transfer Pump 2

Bulk Acid Transfer Pump 2

Sodium Hydroxide Recirculation Pump 1

Sodium Hydroxide Transfer Pump 2

Degasifier Air Blower 2

Degasifier Transfer Pump 2

Degasifier Transfer Pump 3

Degasifier Cleaning Pump 2

The electrical equipment in the Membrane Building Electrical Room is in good condition. Normal preventive maintenance is recommended.

4.8.2.3 High Service Pump Station Electrical Building

The high service pump station electrical building was constructed in the 1970s as part of the original lime softening West WTP. Note that the lime softening facilities were demolished in 2004. Transformer 12TX1 supplies power to HSPS Switchboard SWBD 4. Switchboard SWBD 4 is rated at 1600 amps. Switchboard SWBD 4 supplies power to MCC 12 and MCC12A. SWBD 4, MCC 12 and MCC12A are in the HSPS Electrical Room. The HSPS Electrical Room is air conditioned. SWBD 4 and MCC12A were installed in 1996. MCC 12 was installed in the 1970s. Figure 4-61 illustrates SWBD 4 and MCC12.

Figure 4-61: Switchboard SWBD 4 and MCC 12

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Switchboard SWBD 4 supplies power to HSPs 1 through 3 which are the horizontal split case pumps located within the HSPS. HSPs 1 and 2 are equipped with VFDs while HSP 3 is equipped with a solid-state reduced voltage starter (SSRVS). It is normal industry for MCC 12 is unknown. MCC 12 distributes power to HSPs 4 and 5 via their associated VFDs. MCC 12A is rated at 600 amps. MCC 12A distributes power to the Plant Lift Station (LS 79) along with the Biscayne Aquifer Well Pumps 4 through 7 (i.e., the offsite wells). Record drawing information is not available that defines the power source for the Biscayne Aquifer Well Pumps 8 and 9 (i.e., the onsite wells).

4.8.2.4 Diesel Engine Generator

The existing diesel engine generator is reported to be 2,000 KW.

City records indicate that it was installed in 1998 as part of the first phase of construction of the GAH WTP membrane treatment. The diesel engine is illustrated in Figure 4-62. The diesel engine generator provides backup power for the water and wastewater treatment plants in the event of loss of primary power. The diesel engine is housed within a sound attenuating enclosure with roof mounted exhaust silencer.

4.8.2.5 Diesel Fuel Tanks 1 and 2

There are two diesel fuel storage facilities that support the operation of the diesel engine generator. Figure 4-63 illustrates the diesel fuel storage tanks. Diesel fuel is conveyed to the diesel engine via a day tank located in the building west of the engine enclosure. City records indicate that the Diesel Fuel Tank 2 was installed in 1998 during the first phase of construction of the GAH WTP. The City does not have records related to the construction of Diesel Fuel Tank 1. However, based on its appearance, Figure 4-62: Diesel Engine Generator

Figure 4-63: Diesel Fuel Storage Tanks

| Water Treatment Plant 4-60 it is assumed that it was constructed in approximately 2003 as part of the GAH WTP expansion to 7.0 mgd.

The diesel fuel tanks are in good condition and likely have many years of remaining useful life.

4.8.2.6 Diesel Fuel Day Tank and Pumps

The diesel fuel day tank and pumps are housed in the building south of the switchgear and west of the generator enclosure. The day tank is illustrated in Figure 4-64. The diesel fuel day tank and pumps are functional and appear to be in good condition.

4.8.3 Recommended Electrical System Upgrades

Using the information gathered from the documentation reviewed, site visits, and awreness of the future proecess area upgrades outlined within this document, Hazen has developed a three-phase approach to improve the electrical distribution system while maintaining plant operations, and improving safety conditions, and electrical reliability and redundancy. The plan was developed in consultation with City staff and the details of the phased approach are provided herein.

Table 4-8 presents the generally accepted expected useful life of various pieces of electrical distribution equipment in ideal conditions. For equipment in less-than-ideal conditions, such as equipment located outdoors or in a harsh environment, the expected useful life is shorter than the values indicated. The values in this table are referenced throughout the remainder of the report.

Figure 4-64: Diesel Fuel Day Tank

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Table 4-8: Electrical Equipment Expected Useful Life

Equipment Expected Useful

Life (Yrs) Panelboard 20-25 Low Voltage Dry Type Transformer 20-25 Low Voltage Switchboard 25-30 Low Voltage Switchgear 25-30 Low Voltage MCC 20-25 Low Voltage VFD Starter 10-15 Low Voltage RVSS Starter 15-20 Low Voltage FVNR/FVR Starter 20-25 Low Voltage Conductors 30-35 Low Voltage Busway 30-35 Low Voltage Transfer Switch (MTS/ATS) 20-25 Medium Voltage Liquid Filled Transformer 20-25 Medium Voltage Liquid Filled USS Transformer/USS Line Up

30-35

Medium Voltage Switchgear 30-35 Medium Voltage MCC 30-35 Medium Voltage RVSS Starter 20-25 Medium Voltage RVAT Starter 30-35 Medium Voltage Conductors 30-35 Medium Voltage Busway 30-35 Protective Relay 20-25 Motors 20-25 SPDs 10-15 Lightning Protection/Grounding System 30-35 Generator 20-25

UPS 5-10

Generator Controls 15-20

In general, the original electrical system was constructed in the 1970s, which puts it almost 50 years old at the time of writing this document. The longest expected useful life of electrical equipment within water and wastewater facilities is 30-35 years on the most robust equipment. That said, any plant-original electrical equipment has surpassed its expected useful life, and although it may have been properly maintained over the years, it should be considered for replacement.

Due to the criticality of the main Switchgear SWGR-1, being the top-end electrical lineup for both the WTP and WWTP, and the location where both the utility and standby generator share a common connection point, it is the most critical component at the facility, and Hazen recommends a phased approach to replacing this lineup as indicated below.

In addition, to replacement of the actual switchgear lineup, it has been noted that the distribution voltgae of the existing electrical system (22.9kV) is an abnormal voltage for a facility of this size using FPL as the electrical utility, and further evaluations of changing the distibution voltage are recommended.

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If it is reocmmended to change the distribution voltage for the site, the switchgear, genreator, and all step-down transformers listed in Table 4-7 would by default be required to be replaced to match the new primary voltage. If the voltage were to remain the same, these items would still be recommended to be replaced due to their age vs. the expected useful life of the equipment. The voltage change would mainly impact the constraints on the sequencing of the replacement of the equipment (e.g. no voltage change would allow items to be replaced one-by-one in no particular order, where a voltage change would required it all to be done at the same time).

4.8.3.1 Phase 1 Immediate Upgrades (0-2 years)

As mentioned above, the criticality of SWGR-1 and its ability to distribute power to both the WTP and WWTP is the primary electrical concern for this facility. Within this piece of equipment, there are two (2) power circuit breakers which act as an automatic transfer switch to allow the plant to operate off of the

Generator). These breakers are the single-point-of-failure devices and City staff have indicated they are starting to have problems with these breakers opening and closing appropriately.

Due to the amount of calendar time it would take to design a switchgear replacement project, procure and manufacturer the electrical equipment, and install the replacement, Hazen recommends a pre-emptive step to ensure the facility can remain operational with some reliability until the proper project can be completed.

The Phase 1 Upgrades include the following:

Contract with Eaton Field Services (manufacturer of the existing SWGR 1 lineup) to purchase one

(1) new/refurbished replacement circuit breaker, and ancillary components

Install the replacement circuit breaker in place of G1

Ship breaker G1 to Eaton for refurbishment

Install the refurbished G1 breaker in place of M1

Ship breaker M1 to Eaton for refurbishment

Once refurbished, store extra breaker as a backup in a conditioned space

This process will provide the most cost-most critical component in order to fully implement a detailed design for complete replacement of the lineup.

4.8.3.2 Phase 2 Near Term Upgrades (2-5 years)

The Phase 2 electrical upgrades consist of the major upgrades to the electrical distribution system for both the WTP and WWTP. Hazen recommends an evaluation of the electrical utility topology and FPL desires for future distribution voltage to be determined in a preliminary engineering report phase of the detailed design. Hazen also recommends providing a complete electrical system design, including Phase 2 and Phase 3 items listed herein, indicating Phase 3 items as bid-alternates to ensure coordination between the phases and to give an opportunity to combine the phases based upon bid day pricing.

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The Phase 2 Upgrades include the following:

Provide new FPL utility services for the WTP and WWTP. The total number of services (currently estimated at 3) should be confirmed with the preliminary engineering report and electrical system evaluation o New FPL services will supply power at low voltage (480V) and eliminate the need for medium voltage distribution for the plant site

Provide new standby generators for each of the new electrical services for backup power o Relocate the existing 2MW generator to be utilized at 1 of the 3 new locations o Provide two (2) new generators for the other locations (480V, Tier 4)

Relocate the existing bulk diesel fuel storage tank to be replaced in Phase 3

New service entrance switchgear with transfer controls to provide power from FPL or the standby generator at each of three (3) locations

New low voltage ductbank raceway systems to re-supply existing LV Switchgear, Switchboards, and Panelboards within each process area

4.8.3.3 Phase 3 Long Term Upgrades (5+ years)

Phase 3 upgrades consist of the Phase 2 items listed above that would need to be deferred from the Phase 2 scope of work due to funding issues.

In addition to the Phase 2 deferred items, Phase 3 items include consideration of replacement of electrical components that are at/near end of useful life and are sequenced with WTP or WWTP process related upgrades. For example, Switchboard 4, installed in 1996, supports the high service pump station, is in good condition, and nearing the end of useful life. There is not a critical electrical driver to replace this lineup, but it should be considered for replacement if the pump station is undergoing an upgrade.

The Phase 3 Upgrades include the following:

Replacement of the existing 2MW generator with a new Tier 4 diesel generators

Replacement of the existing bulk diesel fuel storage tank

Replacement of existing LV Switchgear, Switchboards, and Panelboards within each process area.

4.8.4 Electrical Grounding System Upgrades

The grounding system at the water/wastewater treatment plant has not been replaced since the construction of the GAH WTP in 1998. Over time, grounding systems can degrade, potentially leading to equipment integrity and safety.

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One option for the City is to retain a firm specializing in lightning protection to conduct a grounding survey.

A firm such as Bonded Lightning Protection, which has been utilized by utilities throughout the state, could be considered for this project. This survey would provide a comprehensive evaluation of the current grounding system, identify any damaged equipment, assess surge protection, and measure resistance to ground throughout the site. Photographs of equipment and measurement displays would also be included.

Key aspects of the assessment would include verifying the continuity of the grounding paths, measuring ground resistance, and evaluating the effectiveness of surge protection. Identifying and mitigating any risks will ensure the reliable and safe operation of the plant. Following the assessment, potential upgrades could be recommended to enhance the grounding system. These might include replacing corroded grounding rods, improving bonding connections, and installing advanced surge protection devices. Implementing these equipment from electrical hazards.

4.9 Instrumentation and Control System

The instrumentation and control system comprises the SCADA system, main and local control panels, field instruments and equipment and other ancillary systems needed to properly monitor and control. Although the system has aged differently across multiple process areas; overall, the entire system feels outdated, with very limited monitor and control capabilities.

4.9.1 SCADA System Upgrades

4.9.1.1 Introduction

The WTP SCADA network is physically isolated from the internet and the Utility Enterprise network except when third party Contractor performs specific maintenance tasks. The system has remote access capabilities through a firewall to grant access to a third party contractor for maintenance, such capabilities are physically removed once the maintenance task ends. Cooper City SCADA HMI Software is GE Ifix, version 5.9. This product has reached the end of support and service date as of October 2023.

4.9.1.2 Recommended Improvements

4.9.1.2.1 Up-to-Date SCADA System

An up-to-date SCADA system, including Historian and iFIX Servers, network switches, workstations, remote clients, licenses, and any other ancillary equipment and software within the monitoring and control system, is essential. As mentioned in the introductory summary, the Supervisory Control and Data Acquisition (SCADA) software has reached the end of its lifecycle, leading to potential threats and vulnerabilities due to the lack of updates and support from the manufacturer. Updating the SCADA system to the most current version is a major step towards mitigating these potential threats. A comprehensive upgrade and update program will be necessary to ensure compatibility between software and hardware as each component of the control system is brought to its most recent version. As part of these upgrades, it is recommended that the city adopts a more contemporary style of graphics for the SCADA system,